Hi, folks; back again...

I got my 19" monitor back Tuesday from the shop after a long-delayed repair.
The image is good now, but now there is a color problem.

Used to be that shades of red onscreen always revealed a small bluish smudge
near the center of the screen, but that didn't spoil it for graphics work.
Now, there is blue "dust" down the left-hand side, the center, and lower
right corner. What happened??

My question is, can anything be done about this? To avoid another 3-week
hassle, is there anything I can do myself to correct the color? Is it the
repairman's responsibility?

One more thing: This Hitachi 751 has a "Degauss" button. Pressing it used to
bounce the image on the screen violently, with the same "bonk" the monitor
made when turning it on. I guessed that was just the degausser degaussing.
Now nothing happens. Opinions??

For reference, I've pasted Jerry Greenberg's answer to my original problem.
(Yeah, it took me that long to get it to the shop.) Sorry for the long
post. As before, I'm grateful for your thoughts.


----- Original Message -----
From: "Jerry G."
Newsgroups: sci.electronics.repair
Sent: Thursday, April 08, 2004 8:59 AM
Subject: Hitachi SuperScan monitor displays odd "ribbon" across top of
screen


Defective capacitors in the vertical amp section in the monitor are
usually
the normal cause of this. It is possible to have some semiconductor or
other
component failures to cause this, but not very often. If you continue to
use the monitor this way, there will be more damage, thus increasing the
cost of the repair as usage goes on. Take the monitor to a service centre
that is authorized to work on computer monitors. This type of repair
should
generally not be too expensive.

After your monitor is properly serviced, it will work normally again.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"DemoDisk" wrote in message
...
This is my first time posting here, and I hope this is the right place for
this problem.

An area about 2.5 cm at the top of my Win 98 desktop shows extra lines --
white, gray, a few black -- just after starting. Icons in this area look
stretched vertically and at the very top of the screen they look "folded
back" on themselves. When I move the mouse pointer to its upward limit,
before it stops it emerges again stretched and heading downward.

The area spans the screen and used to shrink to about 4mm high after ten
minutes or so. Lately I've noticed that it doesn't reduce as much (ie,
problem getting worse?). If I shut the monitor off with Win98 running and
then turn it on again, they're back.

One odd thing is, the length of each successive line is a bit less than
the
one above it, so the ends of the "band" are angled inward. Also, the Win98
splash screen doesn't show the lines during boot-up. Weird?

I've been thinking maybe a reinforcing wire on the mask broke? Someone
suggested a "broken sweep generator." I hope it's a software problem and
not
the monitor, but please tell me if you know what it is and what to do.
Please help if you can. Thanks.

Oh, and it's a Hitachi SuperScan Elite 751.

JPM

It sounds like the servicer forgot to connect back the degaussing coil, or
this has failed.

How old is the monitor, and how much did you have to lay out to have it
fixed???

--

Jerry G.
==========================


"DemoDisk" wrote in message
...
Hi, folks; back again...

I got my 19" monitor back Tuesday from the shop after a long-delayed repair.
The image is good now, but now there is a color problem.

Used to be that shades of red onscreen always revealed a small bluish smudge
near the center of the screen, but that didn't spoil it for graphics work.
Now, there is blue "dust" down the left-hand side, the center, and lower
right corner. What happened??

My question is, can anything be done about this? To avoid another 3-week
hassle, is there anything I can do myself to correct the color? Is it the
repairman's responsibility?

One more thing: This Hitachi 751 has a "Degauss" button. Pressing it used to
bounce the image on the screen violently, with the same "bonk" the monitor
made when turning it on. I guessed that was just the degausser degaussing.
Now nothing happens. Opinions??

For reference, I've pasted Jerry Greenberg's answer to my original problem.
(Yeah, it took me that long to get it to the shop.) Sorry for the long
post. As before, I'm grateful for your thoughts.


----- Original Message -----
From: "Jerry G."
Newsgroups: sci.electronics.repair
Sent: Thursday, April 08, 2004 8:59 AM
Subject: Hitachi SuperScan monitor displays odd "ribbon" across top of
screen


Defective capacitors in the vertical amp section in the monitor are
usually
the normal cause of this. It is possible to have some semiconductor or
other
component failures to cause this, but not very often. If you continue to
use the monitor this way, there will be more damage, thus increasing the
cost of the repair as usage goes on. Take the monitor to a service centre
that is authorized to work on computer monitors. This type of repair
should
generally not be too expensive.

After your monitor is properly serviced, it will work normally again.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"DemoDisk" wrote in message
...
This is my first time posting here, and I hope this is the right place for
this problem.

An area about 2.5 cm at the top of my Win 98 desktop shows extra lines --
white, gray, a few black -- just after starting. Icons in this area look
stretched vertically and at the very top of the screen they look "folded
back" on themselves. When I move the mouse pointer to its upward limit,
before it stops it emerges again stretched and heading downward.

The area spans the screen and used to shrink to about 4mm high after ten
minutes or so. Lately I've noticed that it doesn't reduce as much (ie,
problem getting worse?). If I shut the monitor off with Win98 running and
then turn it on again, they're back.

One odd thing is, the length of each successive line is a bit less than
the
one above it, so the ends of the "band" are angled inward. Also, the Win98
splash screen doesn't show the lines during boot-up. Weird?

I've been thinking maybe a reinforcing wire on the mask broke? Someone
suggested a "broken sweep generator." I hope it's a software problem and
not
the monitor, but please tell me if you know what it is and what to do.
Please help if you can. Thanks.

Oh, and it's a Hitachi SuperScan Elite 751.

JPM

"Jerry G." wrote in message
...
It sounds like the servicer forgot to connect back the degaussing coil, or
this has failed.

How old is the monitor, and how much did you have to lay out to have it
fixed???

--

Jerry G.
==========================

Jerry G.! Good to hear from you again. Here is some data from the back of
the monitor:

Hitachi SuperScan Elite 751
Mod. No. CM751U
Manufactured September 1999

S. No. CM751U - 515 and then
# V9I 041301

The recent repair cost $55. Think it was worth it? I guess I should have put
the money into a new one instead.

JPM

"Ray" wrote in message ...
Putting both of those symptoms together, I'd say the servicer may
have
forgotten to plug the degaussing coil back into the motherboard.

Ray

Thanks for your answer, Ray.

Two questions, please. Are degaussing coils supposed to behave like that
(i.e, "Bonk," and the image shaking like that?) And did you mean that
plugging in the degaussing coil would eliminate the blue shadowing? I'd do
it myself if I could avoid hauling it back to the shop again, but I'm no
technician.

JPM

"DemoDisk" wrote in message
...

"Ray" wrote in message
...
Putting both of those symptoms together, I'd say the servicer may
have
forgotten to plug the degaussing coil back into the motherboard.

Ray

Thanks for your answer, Ray.

Two questions, please. Are degaussing coils supposed to behave like that
(i.e, "Bonk," and the image shaking like that?) And did you mean that
plugging in the degaussing coil would eliminate the blue shadowing? I'd
do
it myself if I could avoid hauling it back to the shop again, but I'm no
technician.

JPM



Yes that's exactly what they're supposed to do.

And yes it should solve the purity error you're seeing. The problem should
be pretty obvious, the coil is usually wound over with black electrical tape
and goes around the bell of the CRT, plugs into the board with a 2 prong
connector.

Hi,

I would consider $55 not much for a repair. I would have gambled on this
myself, as long as I know that the CRT emission is good. When we start
talking about $150 to $200 and up for servicing this type of set, I
would then have second thoughts. Each of us have our own opinions about
where the value cut-off point is for this type of thing. I am a bit of a
gambler at times. Believe me, I've had my share of losses and gains in
guessing at things.

I would have them check the degaussing coil, and its connections before
panicking about other possible faults.

--

Jerry G.
======

"DemoDisk" wrote in message
...

"Jerry G." wrote in message
...
It sounds like the servicer forgot to connect back the degaussing
coil, or
this has failed.

How old is the monitor, and how much did you have to lay out to have
it
fixed???

--

Jerry G.
==========================

Jerry G.! Good to hear from you again. Here is some data from the back
of
the monitor:

Hitachi SuperScan Elite 751
Mod. No. CM751U
Manufactured September 1999

S. No. CM751U - 515 and then
# V9I 041301

The recent repair cost $55. Think it was worth it? I guess I should have
put
the money into a new one instead.

JPM

=============================

Hi, folks; back again...

I got my 19" monitor back Tuesday from the shop after a long-delayed
repair.
The image is good now, but now there is a color problem.

Used to be that shades of red onscreen always revealed a small bluish
smudge
near the center of the screen, but that didn't spoil it for graphics
work.
Now, there is blue "dust" down the left-hand side, the center, and lower
right corner. What happened??

My question is, can anything be done about this? To avoid another 3-week
hassle, is there anything I can do myself to correct the color? Is it
the
repairman's responsibility?

One more thing: This Hitachi 751 has a "Degauss" button. Pressing it
used to
bounce the image on the screen violently, with the same "bonk" the
monitor
made when turning it on. I guessed that was just the degausser
degaussing.
Now nothing happens. Opinions??

For reference, I've pasted Jerry Greenberg's answer to my original
problem.
(Yeah, it took me that long to get it to the shop.) Sorry for the long
post. As before, I'm grateful for your thoughts.


----- Original Message -----
From: "Jerry G."
Newsgroups: sci.electronics.repair
Sent: Thursday, April 08, 2004 8:59 AM
Subject: Hitachi SuperScan monitor displays odd "ribbon" across top
of
screen

Hi,

I would consider $55 not much for a repair. I would have gambled on this
myself, as long as I know that the CRT emission is good. When we start
talking about $150 to $200 and up for servicing this type of set, I
would then have second thoughts. Each of us have our own opinions about
where the value cut-off point is for this type of thing. I am a bit of a
gambler at times. Believe me, I've had my share of losses and gains in
guessing at things.

I would have them check the degaussing coil, and its connections before
panicking about other possible faults.

--

Jerry G.
======

"DemoDisk" wrote in message
...

"Jerry G." wrote in message
...
It sounds like the servicer forgot to connect back the degaussing
coil, or
this has failed.

How old is the monitor, and how much did you have to lay out to have
it
fixed???

--

Jerry G.
==========================

Jerry G.! Good to hear from you again. Here is some data from the back
of
the monitor:

Hitachi SuperScan Elite 751
Mod. No. CM751U
Manufactured September 1999

S. No. CM751U - 515 and then
# V9I 041301

The recent repair cost $55. Think it was worth it? I guess I should have
put
the money into a new one instead.

JPM

=============================

Hi, folks; back again...

I got my 19" monitor back Tuesday from the shop after a long-delayed
repair.
The image is good now, but now there is a color problem.

Used to be that shades of red onscreen always revealed a small bluish
smudge
near the center of the screen, but that didn't spoil it for graphics
work.
Now, there is blue "dust" down the left-hand side, the center, and lower
right corner. What happened??

My question is, can anything be done about this? To avoid another 3-week
hassle, is there anything I can do myself to correct the color? Is it
the
repairman's responsibility?

One more thing: This Hitachi 751 has a "Degauss" button. Pressing it
used to
bounce the image on the screen violently, with the same "bonk" the
monitor
made when turning it on. I guessed that was just the degausser
degaussing.
Now nothing happens. Opinions??

For reference, I've pasted Jerry Greenberg's answer to my original
problem.
(Yeah, it took me that long to get it to the shop.) Sorry for the long
post. As before, I'm grateful for your thoughts.


----- Original Message -----
From: "Jerry G."
Newsgroups: sci.electronics.repair
Sent: Thursday, April 08, 2004 8:59 AM
Subject: Hitachi SuperScan monitor displays odd "ribbon" across top
of
screen